Answer: You do not need to automatically replace your tires. After four years, it is time to start checking for cracks, a sign of hardening rubber. These cracks can be in obvious places, such as spider-web patterns on the sidewall, or they can appear inside the tread groves. With a strong light, look into the grooves at the base of the tread blocks and check if there are any separation lines starting to appear. If there are small cracks, monitor the tires more closely. If they start to grow more rapidly, it’s time for a tire change.
Question: “I bought a new set of Proxes T1Sport tires. I just want to use two of the new ones for now. Should I put the new ones on the front and put the best used ones on the back?”
Answer: The industry standard for mounting just two tires is: Best tires on the back. That means new tires always go on the rear, regardless of whether the vehicle is FWD, RWD or AWD. It’s a safety issue, and the logic is simple as follows: A car when it loses it’s traction, can skid either at the front (understeer) or rear (oversteer). The average driver in an emergency can control understeer, but not oversteer. Oversteer will spin the car. So the best tires go on the end of the car that needs the most help staying on the payment. Under braking, the weight of the car shifts to the front. Less weight on the rear means less grip. That’s why the tires with the most grip are needed there.